Lifting-jack



(No Model.) A. 8v S. H. HUGHES.

LIFTING JACK.

No. 353,223. Patented Nov. 23, 1886.

IEEEEEINHHWI v UNITED STATES PATENT OFFICE.-

AUGUSTUS HUGHES AND SAMUEL H. HUGHES, OF DAYTON, OHIO.

LlFTlNG-JACK.

SPECIFICATION forming part of Letters Patent No. 353,223, dated November 23,1886.

Application filed September 16, 18 86. Serial No. 218,700. (No model.)

.To aZZ whom it may concern:

Be it known that we, AUGUSTUS HUGHES and SAMUEL H. HUGHEs,oitizens of the United States of America, residing at Dayton, in the county of Montgomery and State of Ohio, have invented certain new and useful Improve ments in Lilting-Jacks; and we do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same, refereuce being had to the accompanying drawings, and to letters or figures of reference marked thereon, which form a part vof this specification.

Our invention relates to certain new and useful improvements in lifting-jacks, the object ofsaid invention being to provide aclieap, simple, and effective liftingjack which can be readily constructed and operated; and to this end our invention consists in the construetion and combination of the parts, as will be hereinafter fully set forth, and specifica'ly pointed out in the claim.

In the accompanying drawings,which illustrate our invention, Figure 1 is a perspective view of a lifting-jack constructed in accordance with our improvement. Fig. 2 is a vertical sectional view.

A refers to the base of our improved lifting-jack, which is provided at the sides with dovetailed recesses or mortises a,within which will lie the dovetailed lower portions of the vertical uprights or side pieces, B B, said side pieces being connected to each other at their upper ends by transverse blocks 0 and 0.

Between the side pieces, B B, and blocks 0 and O is placed a fiat'sliding piece, D,which is provided with suitable steps, (1.

E refers to a lever, the end E, which is located between the posts B and B, being eanrshaped, as fully shown in Fig. 2, said cam-shaped end being adapt-ed to bear upon the lower edge of the sliding piece D, for elevating the same. This lever, adjacent to its cam-shaped end, is secured between the uprights B B by a bolt, 6, beneath which is located a transverse pin or bolt, f, which is adapted to bear upon the under side of the lever, adjacent to its camshaped head, so as to prevent the handle portion of the lever coming in contact with the ground, said pin ing device, H, which is secured thereto by a pivot, h, andsaid lever-lifting device has a rearwardly-projecting member, t, the terminal portion of which extends across the'handle portion of the lever, so as to be within easy access of the operatorsthuinb for depressing the same to elevate the member-j, which extends above the upper portion of the lever and passes through an eye, It, in the pawl.

By depressing the member i the member j will be raised and carry with it the end of the pawl, so as to disengage it from the rack-bar. When the lever is elevated or depressed, the member-j of the pawl-lifting device will slide through the eye'k.

We are aware that prior -to our invention it was not broadly new to provide a liftingjack with a sliding portion which is adapted to be elevated by a earn-lever, and we do not claim such construction, broadly; but

VVhat-we claim as new, and desire to secure by Letters Patent, is v The combination, in a lifting-jack constructed substantially as shown and described, of a sliding block, D, adapted to bear upon a cam-shaped end of a lever, so as to elevate the handle portion of said lever, a gravitypawl, G, pivoted to the frame of the liftingjack, so as to engage with the serrated bar attached to the upper edge of the lever, a pawllifting device, H, pivoted to the lever, near the handle portion of the same, and provided with a member which extends transversely over the hand-grasping portion, a member, j,

The lever E, adjacent to its handle portion, is provided with a pawl-liftwhich passes through an eye, k, located near the lower end of the pawl G, so as to proin presence of two witnesses. vide a means for disengaging said pawl from AUGUSTUS HUGHES. the rack-bar when it is desired to lower the SAMUEL H. HUGHES. 5 vertical sliding block of the lifting-jack, sub- \Vitnesses:

stantially as shown, and for the purpose set forth.

In testimony whereof we affix our signatures SAMUEL WVooDs, H. W. ELLIS. 

